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Finding the Fourth Proportional to 29,328.72, 40,472.58 and 17,385

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Solution

The fourth proportional to 29,328.72, 40,472.58 and 17,385 is: 23,990.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,328.72 : 40,472.58 = 17,385 : x
  2. Step 2: Convert to fraction form
    29,328.72/40,472.58 = 17,385/x
  3. Step 3: Cross multiply
    29,328.72x = 40,472.58 × 17,385
  4. Step 4: Simplify right side
    29,328.72x = 703,615,803.30
  5. Step 5: Solve for x
    x = 703,615,803.30/29,328.72
  6. Step 6: Final answer
    x = 23,990.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.